The exit poll data used in this report come from the Edison Media Research and Mitofsky International National Election Pool Entrance and Exit Poll Surveys of voters in states that have held primaries and caucuses this year. Data for the analysis of voters in the 16 Democratic primaries held on Super Tuesday, Feb. 5, 2008, were provided to the Pew Hispanic Center on a contractual basis by Edison Media Research and Mitofsky International. These 16 exit polls were aggregated and weighted into a single dataset for Hispanic, white non-Hispanic and black non-Hispanic voters. The sample size for the aggregated Hispanic voter dataset was 1,809 survey respondents. The sample size for the white non-Hispanic voter dataset was 11,558. And the size for the black non-Hispanic voter dataset was 3,120. The 16 states included in this aggregated analysis are Alabama, Arizona, Arkansas, California, Connecticut, Delaware, Georgia, Illinois, Massachusetts, Missouri, New Jersey, New Mexico, New York, Oklahoma, Tennessee and Utah. All other analysis from entrance and exit polls conducted by Edison/Mitofsky in non-Super Tuesday states, including Texas, comes from tabulations made publicly available by CNN. Results from Puerto Rico are based on complete vote tallies published by the Puerto Rico State Electoral Commission.